Improved stone-sawing machine



at am `GEORGIE MORGAN, OF' BROOKLYN, Navitronic.

Leners Patent Namaste, daad .my 12, 1ero.

IMPRQVED STONE-SAWING MACHINE.

The `rzhe'ldule referred to n Athese Letters Patent and making part of the same l To all lwhom; it may concerti :-V

Be it known that I, vGrao'uern MORGAN, of Brook-` lyn, in the county of uKings and 4State of NewYork,

have invented anew and useful Improvement; in

i 1 r i Machines for Sawing Stone, of which theffollowing'is a full,clear, andexact description, reference being had to the accompanying drawing forming part of this specification, and in4 which` i .i Figure 1 represents a partly-broken side elevation ,of a machine for sawing stone constructed in accordancewithjmy improvement, and t Figure 2, a plan of the same. Similar' letters of reference indicate corresponding parts.`

Myinventon embraces a novel combination of me-Yl chamcal devices for suspending and regulating thev are arranged` `to" travel up and down Vertical grooves,

` d, made in the uprightsofthe main frame.

Connected with the` cross-shafts b li are chains, c c,

. which .pass up over pulleys, ff, on upper cross-shafts g g,that haxje their bearings on` the main frame, `said chains bei'gcontinued from the pulleys ff, to pass in reversefdirections from opposite sides of the machine, subject to a series o r succession of turns, around drums, t'lafast on an intermediate cross-shaft, D, so

that, on rotating thelatter in yopposite directions, the sawframe B is raised and lowered in a uniform manner from both or opposite ends. l On` ,this cross-shaft I) is keyed awvorinjwheeh-E, made to gear withan endless screw, F, on a horizontal shaft, G, which, accordinglyy as it is rotated to the tighter left, raisesicr lowers the "saw-.ti'ame, and, when s'aidishaftfis,notrotatedserves to hold the sawframc in'lock, or` from descending. by its weight, bythe gear of theworm-wheel-rE with the screw F.

rEhe shaft Gis operated to allow of the heavy sawfrzu'ne, with its saws, descending, when at work on the stone, `by multiplying gearing,- cons'i'sting of a screw,

' i. v on al branch cross-shaft, I, working into a wormwheel, J, on the shaft (l. This insures a` slow and powerful motionto check or control the descent of the saw-frame, and, in conjunction with the wheel E and screw-F, makeslmore perfect and secure the lock when descent.

The worm-wheel J is made to slide by a feather on .the shaft G, so that' it maybe Vthrown out of gear `eccentric relation, by a" wrist-pin or connection, ,'to a rotating driving-pulley, L, loose on' a shaft, M, said pawl workinginto and over a ratchet-wheel, N, fast on the shaft I, to rotate, in anV intermittent manner, said shaft in the/'necessary direction to permit of thel descent of the saw-frame at intervals, as required."

The extent of such downward feed, each stroke or "times regulated, as the quality of the stone or other circumstancesmay require, by a vertically-adjustable slideor prop, O, over which the pawl K plays, and on which it rests during its action, so that, as said pawl is reciproeatedby the pulley L, thel sameis made to fall sooner or later, or remain for a longer Or .shorter period in gearlwith the ratchet-wheel N, according as `the prop O, which may be adjusted by a set-screw and slot` k,"s raised or lowered, to give more or less rocking action to the pawl as it is reciprocated, aud'thereby to vary the extent of its feeding-gear or'conneci tion with the ratchet-wheel, the length of stroke communicated to which regulates the downward feed ot the saw-frame. This forms a most simple and efficient meansof accomplishing suchend or purpose,

vwith ever provision as regards nicety of adjustment.

Vhen it is required `to run the saw-frame up or down with .greater speed, as in bringing the saws down to the stone, or lifting them from it, the wormwheel J is slid ont of gear with the screw H, as represented in lig. 2,v andthe driving-belt shifted from the lcoseV pulley L onto a fast pulley, l), on the shaft M, and Vone or other ot' two reversing bevel-wheels Q Q', in sliding gear, with the shaft M, thrown,rby a clutch-lever, R, into gear with' a bevel-wheel, S,'on the shaft G, accordingly as it is required to raise or lower the saw-frame.

What is hereelaimed, and desired to he secured hy 1. The combination.of the adjustable prop 0 with the pawl K, the revolving wrist-pin or connect-ion i, and the ratchetwheel N, essentially as and for the purpose herein set forth. l

.2. The combination of the sliding worin-wheel J, the screws 1 F, the worm-wheel E, the shaft G, the bevel-wheel S, and the reversing bevel-wheels Q Q', substantially as lshown and described.

' i p GEORGE MfmGAN.

Witnesses:

Flinn HAYNES,

Ron. E. RABEAU 

